申请人:Displaytech, Inc.
公开号:US05380460A1
公开(公告)日:1995-01-10
Chiral, nonracemic compounds of the general formula: ##STR1## wherein m and n are either both zero, both equal one or n is equal to one and m is equal to zero, X and Y and Z are halogens, R' is an alkyl, alkoxyl, alkenyl, thioalkyl, thioether, ether, or alkylsilyl group containing three to fifteen carbon atoms, and R is an alkyl group having one to fifteen carbon atoms and where Ar is: --A.sub.a --(E).sub.e --B.sub.b --(F).sub.f --D.sub.d -- where A, B and D independently of one another are aromatic rings which are selected from the group consisting of a phenyl, a pyridine ring, a pyrimidine ring, a pyridizine ring, a pyrazine ring and a thiadiazole ring, wherein a, b and d are integers from 0-3 such that a+b+d=2-3, where E and F independently of one another are linking groups selected from the group consisting of a --CH.sub.2 --CH.sub.2 --, --CH.sub.2 --O--, --CH.sub.2 --S--, --O--CH.sub.2 --, --S--CH.sub.2, --OOC-- or --COO-- wherein e and f can be 1 or 0, when e and/or f is 0, the adjacent aromatic rings are linked by a carbon-carbon single bond, preferably e and f are both 0 or one of e or f is 1, and wherein * indicates a chiral center, which are useful as ferroelectric liquid crystal components having high polarization are described.
本发明涉及具有以下一般式的手性、非外消旋化合物:##STR1## 其中m和n都为零,都为一,或者n为一且m为零,X、Y和Z为卤素,R'为含有三到十五个碳原子的烷基、烷氧基、烯基、硫代烷基、硫醚、醚或烷基硅基团,R为含有一到十五个碳原子的烷基,其中Ar为:--A.sub.a --(E).sub.e --B.sub.b --(F).sub.f --D.sub.d -- 其中A、B和D相互独立地为选自苯基、吡啶环、嘧啶环、吡啶嗪环、吡嗪环和噻二唑环的芳香环,其中a、b和d是从0-3的整数,使得a+b+d=2-3,其中E和F相互独立地为选自--CH.sub.2 --CH.sub.2 --、--CH.sub.2 --O--、--CH.sub.2 --S--、--O--CH.sub.2 --、--S--CH.sub.2 --、--OOC--或--COO--的连接基团,其中e和f可以为1或0,当e和/或f为0时,相邻的芳香环由碳-碳单键连接,最好是e和f都为0或e或f之一为1,并且其中*表示手性中心。这些化合物可用作具有高极化的铁电液晶组分。